Water-gage



' (NoModel.)

l F. H. LINCOLN.

. WATER GAGE. N0. 278,345.` Patented May 29,1883. .A

Q umnmunmulllll y A 76, ME -om PATENT? OFFICE,

EEANCISH. LINCOLN, 0E CHELSEA, MASSACHUSETTS.

` WATER-GAGE.

SPECIFICATION forming part of Letters Patent No. 278,345, dated May 29,lees,

Application filed VFebruary 14,1883. (No model.)

Massachusetts, have invented a certain new and useful ImprovementinGage-Tube Fittings for Steam-Boilers, of which the following'is adescription sufficiently full, clear, and exact to enable any personskilled in the art or science to which said invention appertains -tomake and use the same, reference being had to the accompanying drawings,formin g a part of this Figure 1 is an isometrical perspective view,showing my improvement, a part ofthe fittings being represented inSection; Fig. 2, a vertical transverse section of the lower valve; Fig.3, alike view of the upper valve, and Fig.4 a verticaln longitudinalsection of one of the stop-cocks.

Likeletters of referenceindicate corresponding parts in the differentigurcs of the draw,-

ings. i

' My invention relates to means for closing .the fittings automaticallywhen the gage-tube is accidentally broken, thereby preventing i steam orhot waterfrom being ejected throughY the gage-tube openings; and itconsists in providing the flttingfsfwitli valves constructed andarranged to operate as hereinafter more fully set forth and claimed, bywhich a more effective device of this character is produced than isnowin ordinary use. i

It` is well` known that. when the ordinary glass gage-tubes of,steam-boilers are acci-l dentally broken much damage frequently occursby the emission of steam and hot water before the' stop-cocks in thefittings can be closed, more especially when the breakage occurs in theabsence ofthe engineer or` frema`h. My improvement` is designed toobviate this objection, and to that end I make use of appliances whichwill be readily understood by all conversant with such matters from thefollowing explanation, their extreme Simplicity rendering an elaboratedescription unnecessary. v

ln the drawings, A represents` thegage tube, and B the upper and Cthelower pipe leading to the boiler. The pipes are respectively providedwith stop-cocks D, and open at their outer ends into the cylindricalchambers serted in the bottom of. the chamber E and its lower end in thetop of the chamber F, being packed in the ordinary manner. -A port, an,opening downwardly, connects'the chamber E with the upper end ofthetube, and a like port, d, opening upwardly, connects the chamber F withits lower end. Disposed in theupper chamber, E, there is a valve, a,

provided with the weighted lever fr, pivoted in the standard t, andadapted to close the port m. The lower chamber, F,"is provided withapetcock or blowoff,7 H, and with a gravitatin g valve, i, having thelever a pivoted by its outer end at r in the hanger o, said valve beingadapted to close the port d. The stop-cock D has its valve-stem fprovided with a double-facedvalve, g, its front or inner face beingadapted to t the seatt, and its rear or outer face the seat n, as shownin Fig. 4, in whichit is represented as Closed, or the valve turned downupon its seat l. In ordi nary stop-cocks of this character it is necesisary to pack the valve-stem carefully to prevent leakage around the stemwhen the valve is open; but in my improved stop-cock, as shown in Fig.4, the valve-stem f is exteriorly threaded to fit a female screw in thestem holder or shank Gr, theshank being `screwed into the globe q, andthe Seat a formed directly in the inner end of the shank, thereby avoidyin g the necessity of using packing for the stem, greatly simplifyingthe parts and reducing the cost of construction, it being understoodthat when the valve is opened or raised from the seat Z the stem is tobe turned out until thevalve restsin the seat u.

In the use ot' my improvement, the stop--A cocks D D being-open, if nowthe tube A is removed or broken, the usual back-pressure on the valve t'will be withdrawn, and the water, i

and as shown in Fig. 4the subject-matter of other Letters Patent, I donot elaim'the same in this specification but,

Having thus explained my invention, what 1 claim is- A water-gageforsteam-boilers, having the pipes B C, stop-cocks D D, chambers E F,and glass tube A, connecting said chambers, the chamber E being providedWith the downwardly-opening port m and lever said lever beng'centrailypivoted in the standard t, and

provided with the valve a, adapted for closing said port', and thechamber F provided with the upward1y-opening port d and lever z, saidlever being pivoted at one end to the hanger V15 QJ, and provided at itsopposite end with the `valve i, adapted to close said port,substantially as set forth.

FRANCIS H. LINCOLN.

Witnesses:

C. A. SHAW,

L. J. WHITE.

